Machine for cutting sheets of glass and the like



Aug. 21, 1934 E. A. RoslN 1,970,919

MACHINE FOR CUTTING SHEETS OF GLASS AND THE LIKE E. A. RoslN 1,970,919MACHINE FOR CUTTING SHEETS 0F GLASS AND THE LIKE Aug. 2l, 1934.

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E. A. RoslN MACHINE FOR CUTTING SHEETS OF' GLASS AND THE LIKE Filedsept. 2'1. 1951 15 sheets-Sheet Si I H l gn/manto@ ED w/N H. Pos/N.

15 Sheets-Sheet 4 E. A. ROSIN Filed Sept. 21. 1931 MACHINE FOR CUTTINGSHEETS OF GLASS AND THE LIKE Aug. 21, 1934.

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MACHINE FOR CUTTING SHEETS OF GLASS AND THE LIKE Filed Sept. 2l, 1951 15Sheets-Sheet 5 Inventor Ebw/N f7. P06/N.

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MACHINE FOR CUTTING SHEETS OF GLASS AND THE LIKE Filed Sept. 21. 1931 l5Sheets-Sheet 6 200 may.;

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Aug. 21, 1934. E. A. msm 1,970,919

MACHINE FOR CUTTING SHEETS OF GLASS AND THE LIKE Filed Sept. 2l. 1931 l5Sheets-Sheet 7 .'z 1 /202 Y 2/4 1 w 9199992999199199-91- Az/ ,f 20)4)INVENTOR ATTO RN EY EDWIN H, P05/N.

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E. A. ROSIN MACHINE FOR CUTTING SHEETS OF GLASS AND THE LIKE Filed Sept.21. 1931 l5 Sheets-Sheet 8 MOTOR `ST'OP SIA/I TCH (Folla/nn o)Ime/nicola' A. RoslN 1,970,919

MACHINE FOR CUTTING SHEETS 0F GLASS AND THE LIKE Filed Sept. 2l. 1931-15 Sheets-Sheet 9 IE n. :IE-4.-

INVENTOR Envy/N H. FOS/N \29/ 2% CUTTER. Deon sufi/TCH? g2 n l f CUTTERLIFT sw/TcH ATTORN EY Aug. 21,1934.

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dufozmq Aug. .5219 1934. E. A. RoslN MACHINE FOR CUTTING SHEETS OF GLASSAND THE LIK Filed Sept. 2l. 1931 l5 Sheets-Sheet ll CUTTER LIFT SWITCHgwuentoz I EDw/N 6l Has/N.

ug- 21, 1934 E. A. Ro'slN 1,970,919

MACHINE FOR CUTTING SHEETS OF GLASS AND THE LIKE Filed Sept. 2l. 1951y15 sheets-sheet 12 Z5- O I CH z M Tal? STOP 5W T EAR nunka) MGTOR STARTSWITCH (Fokwnno) gri/tunica' ED WIN Pos/N.

Aug- 21, 1934 E. A. RoslN 1,970,919

MACHINE FOR CUTTING SHEETS OF GLASS AND THE LIKE Filed sept. 21. 1931'1S sheets-sneet 1s INVENTOR EDWIN H, P06/.N-

ATTORNEY AJg- 21, 1934- E. A. RoslN 1,970,919

MACHINE FOR CUTTING SHEETS OF GLASS AND THE L'IKE Filed sept. 21. 1931l1:5'Smets-'sneet 14 sus :46

336 ass INVENTOR ATTORNEY Aug. 21, 1934. E, A ROSIN 1,970,919

MACHINE FOR CUTTING SHEETS OF GLASS AND THE LIKE Filed Sept. 21. 193115v Sheets-Sheet l5 EDw//Y f7. P05/N' Patented Aug. 21, 1934 UNITEDSTATES PATENT OFFICE Edwin A. Rosin, Toledo, Ohio, assignor to Libbey-Owens-Ford Glass C corporation of Ohio ompany, Toledo, Ohio, a

Application September 21, 1931, Serial No. 564,039

21 Claims.

The present invention relates broadly to cutting apparatus and moreparticularly to an improved machine for effecting thecutting of glasssheets or plates as required to obtain `true edges,

effect the elimination of defects, or both.

This invention is primarily designed to do away with the operation ofhand cutting as now carried fects therein. This hand cutting is not onlyvery expensive, demanding highly skilled labor, but also gives arelatively large percentage of breakage and waste from imperfect cuttingor accidental moving of the straight edge. The present invention isdesigned to overcome these defects and to greatly reduce the cost of thecutting operation.

The principal object and aim of this invention is the provision of aglass cutting machine adapted to effect either a single cuttingoperation or a plurality of cutting operations simultaneously, wherebythe time required for cutting up a sheet of glass is materially reducedand the e'ort on the part of the operator correspondingly lessened.

Another object of the invention is the provision of a cutting machine ofthe character above described embodying various novel and improvedieatures of construction, arrangement and operation, all of which willbe more fully hereinafter described.

In the drawings forming a part of this application and wherein likenumerals are employed to designate like parts throughout the same,

Fig. 1 is a plan view, partially broken away, of a. cutting machineconstructed in accordance with the present invention,

Fig. 2 is a vertical longitudinal section therethrough, Fig. 3 is a planview of the base or sub-structure, with the work-carrying table andcutting 5 mechanism removed,

Fig. 4 is a longitudinal section tially on line 4 4 of Fig. 1, Fig. 5 isa vertical section taken substantially on line 5 5 o1' Fig. 4.

Fig. 6 is a vertical section taken substantially on line 6 6 of Fig. 4,

Fig. 7 is a vertical section taken substantially on line 7 7 of Fig. 4,

Fig. 8 is -a front elevation of machine, partially broken away,

taken substana portion of the Fig. 9 is a section taken substantially online 9 9 of Fig. 8,

Fig. 10 is a vertical longitudinal sectionthrough one of the cuttingunits,

Fig. 1l is a section taken substantially on line 11 11 of Fig. 10,

Fig. 12 is a section taken substantially on line l12-12 of Fig. 11,

Fig. 13 is a section taken substantially on line 13 13 of Fig. 10,

Fig. 14 is a section taken substantially on line 14 14 of Fig. 1

Fig.'15 is a perspective view, partially in section, of one of thecutter holder assemblies,

Fig. 16 is a plan view of a portion of the switchboard provided forcontrolling the cutters,

Fig. 17 is a section taken substantially on line 17-17 of Fig. 14. i l

Fig. 18 is a plan view taken on lines 18 18 of Fig. 10,

Figs. 19 to 23 inclusive are views showing the construction andoperation of the hook members which are provided for eiecting transferof the sheets subsequent to cutting from the cutting section of thetable to the receiving section thereof,

Fig. 24 is a detail view of a portion of the Fig. 36 is a wiring diagramof the brake actuating and brake holding circuits, v

Fig. 37 is a wiring diagram of the brake operating circuit,

Fig. 38 is a Wiring diagram of the motor actuating and motor holdingcircuits,

Fig. 39 is a wiring diagram of the motor opery ating circuit, and

Fig. 40 is a composite wiring diagramy of the various circuits shown inFigs. 36 to 39.

Referring now to the drawings, and particularly with reference rst toFigs. 1 to 7 inclusive, the cutting machine illustrated therein may besaid to consist generally of three principal parts or units, namely, thesupporting base or sub-structure A, the table B movably carried uponsaid base,

and the cutting mechanism C mounted above the table, said cuttingmechanism C being stationary,

and the table B, which is adapted to support the glass sheets to be cut,being movable back and 5 forth therebenea The base A of the machineconsists ofthe two longitudinally extending vertical side members 50 and51 which are preferably in the form of castings arranged in parallelismwith respect to one another and being connected together adiacent theiropposite ends and also intermediate their ends if desired, by a suitablenumber of cross beams 52. Each side member 50 and 51 is formed with arelatively wide supporting base plate 53 and a relatively narrower topplate 54 connected by vertical strengthening ribs 55. Car-s ried by thetop plates 54 of side members 50 and 51 are the rails 56 and 57respectively which movably support the table B thereupon.

The table Bis divided longitudinally into two principal parts orsections 58 and 59, the former constituting the cutting section uponwhich the sheets are supported during cutting, and the latter serving asa receiving section for receiving the glass from the cutting sectionafter the cutting thereof as will be more fully hereinafter apparent.

The cutting section 58 of the table B consists of a main substantiallyrectangular casting 60 mounted at its opposite sides and also adjacent 0each end thereof upon wheels 61 which are supported upon and run alongthe rails 56 and 57, each wheel 61 being carried upon a shaft 62journaled within a bearing bracket 63 secured to casting 60 by bolts orthe like 64. Preferably carried by the bearing brackets 63 are wipingstrips 65 of felt or 'die like which engage the upper surfaces of therails 56 and 57 and serve to keep them clean and free from foreignmatter.

In order to prevent any lateral vibratory movement of the table B, theremay be provided at one side of the said table a suitable number of pairsof rollers 66 and 67 which engage opposite sides of the correspondingrail 56 or 57. Each roller is mounted upon a vertical pin 68 received atits upper end within a housing 69 and at its lower end within a plate70. The housing 69,

which fits over the roller, is carried by the casting 60, while theplate 70 is secured to said housing by bolts or the like 71.

The main table casting 60 is provided with a fiat horizontal top 72 uponwhich is carried a series of wooden strips 73 extending longitudinallyof the table. These wooden strips are stood on edge and are positionedto abut one another, being secured together by a plurality of spacedtransverse tie rods 74. The strips 73 form, in effect, a substantiallysolid wooden bed upon whichis supported a plurality of longitudinally.extending transversely spaced wooden beams 75.

Positioned wi the space between any two adjacent beams 75' is a pair ofspaced longitudinally `extending metal strips 76 secured together and atthe same time held spaced from one another by a series of spaced blocks77 (Fig. 4.) Ar- 55. ranged between and carried by the metal strips 76of each pair are a plurality of relatively small rollers 78 moimted uponpins 79, and which rollers project above the upper edges of said strips.The said strips 76 of each pair are supported at opposite ends and alsointermediate their ends, if desired, upon transverse roller pins 86which extend through inclined bayonet slots 81 in the strips and aresupported by the U-shaped members 82 secured to the wooden bed byfastening 75 elements83 (Fis. 7).

Extending transversely through all of the pairs of strips 76 at apoint'substantially intermediate the ends of table section 58 is a shaft84, and carried by this shaft adjacent each side of the table are thesubstantially square blocks 85. the numeral 86 designates asubstantially vertically disposed rocker arm pivotally mountedintermediate its ends upon a pin 87, said pin being supported at itsopposite ends within the spaced portions of a substantially U-shapedbracket 88 secured to the main table casting 60 by fasten-- ing elements89. The upper end of the rocker arm 86 is slotted to receive the metalstrips 76 (Fig. 6) and is also bifurcated (Fig. 4) to provide spacedparallel legs 90 which straddle the square blocks 85.

Positioned adjacent the front end of the machine is a stop member 91against which the lower end of the rocker arm 86 is adapted to abut uponforward movement of the table, while a similar stop member 92 (Fig. 3)is provided adjacent the rear end of the machine and against which thelower end of the said rocker arm is adapted to abut upon rearwardmovement of the table. Each stop member 91 and 92 consists of ahorizontal bolt threaded through a lug 93 carried intermediate the endsof a horizontal plate 94 secured in place by fastening elements 95 whichpass through the base of the respective rail 56 or 57 and the top plate54 of 105 the side member 50 or 51.

With such an arrangement as described above, it will be apparent that asthe table B moves forwardly and the lower ends of the rocker arms 86engage stop bolts 91, the upper ends of said 110 rocker arms will beswung upon pins 87 to the right (Fig. 4) which will move all of themetal strips 76 forwardly. When this is done, the roller pins 80 willmove into the upper ends of bayonet slots 81 and thereby permit therollers 78 to be lowered beneath the upper surfaces of wooden beams 75.However, when the table is moved rearwardly and the lower ends of rockerarms 86 engage stop bolts 92, the upper ends of said rocker arms will beswung to the left, thereby moving all of the strips 76 to the left and,when this is done, the roller pins 80 will be moved into the lowerportions of the bayonet slots 81, permitting the rollers 78 to be raisedupwardly so as to project above the level of beams 75. During thisraising and lowering of the rollers 78, there will of course be acertain amount of sliding action between the legs 90 formed at the upperends of rocker arms 86 and the square blocks 85 carried by shaft 84. Dueto the particular formation of the bayonet slots 81 as shown in Fig, 4,the rollers 78 will be held in their elevated position by engagement ofthe roller pins 80 within the offset portions 96 of the slots untillowered by engagement of rocker arms 86 with stop bolts 91. Carriedalong each longitudinal side edge of the cutting section 58 of the tableis a beam 97 supported upon a plurality of boards 98 and secured to top72 of casting 60 by fastening elements 99.

The receiving section 59 of table B includes a pair of spacedlongitudinally extending parallel shafts 100, one being positioned aboveeach of the rails 56 and 57. Each of these shafts is secured at itsinner end to the main table casting 60 145 and has mounted thereon aplurality of clamps 101 carrying wheels 102 which run upon the saidrails. The shafts at opposite sides of the ytable are connected togetherat their opposite ends and also intermediate their ends, if desired, 150

by a plurality of cross members 103. Supported upon these cross members103 are a plurality of longitudinally extending transversely spacedwooden strips 104, each carrying a U-shaped channel member 105, which inturn carries a series of freely rotatable rollers 106v similar to therollers 78 of cutting section 58. 'I'he rollers 106 are not adjustablevertically, but are on the contrary maintained in the same verticalposition at all times. When the rollers 78 of cutting section 58 are intheir lowered position, they are arranged slightly beneath the level ofrollers 106, whereas when in their elevated position, they are insubstantial horizontal alignment therewith.

In order to facilitate the cutting operation and better the action ofthe cutting tools, it is desirable to oil the glass sheets or platesalong the path to be traveled by the cutting tools. To this end, thereis mounted upon the top of the table B between the adjacent ends of theWooden strips 73 and 104 which are spaced from one another, (Figs. 2 and4) an oiling device designated in its entirety by the numeral 107 andcomprising a reservoir 108 adapted to contain a quantity of oil 109 andbeing supported upon a plurality of shims 110. The oiling device alsoincludes a substantially inverted U-shaped member 111 covered with awick 112 of suitable material such as felt or the like, the downturnededges of said wick being immersed Within the oil. With such anarrangement, the oil will pass upwardly by capillary attraction into andthrough the wick 112.

Y The means for effecting the desired reciprocat ing movement of thesheet supporting table B along the rails 56 and 57 maybe as follows:

Carried by` the underside of the main table castv ing 60 is alongitudinally extending rack bar 113, and adapted to mesh therewith isa drive pinion 114 keyed to a transverse shaft 115 mounted in theopposite side Walls of a housing 116 which serves to enclose the drivingmeans. Also keyed upon shaft 115 is a spur gear 117 meshing with thetoothed segment 118 pivotally mounted at its lower end upon a shaft orpin 119. Secured to the segment intermediate its upper and lower ends isa pitman rod 120, the forward end thereof being bifurcated to providespaced legs 121 which straddle the segment and are pivotally connectedthereto as at 122. The opposite end of the pitman rod has a pivotalmounting with the crank 123 also rotatably mounted within the side wallsof housing 116. This crank 123 is driven through suitable reductiongearing located in gear case 124 from amotor 125, the driving beingeiected by means of a belt 126 trained about a pulley 127 on the motorshaft and also about a pulley 128 upon a shaft associated with the speedreduction gearing.

A magnetic brake 129 of any well known or preferred construction isassociated with the speed reduction gearing in gear case 124 in a mannerto stop the rotation of the crank 123 and consequently the reciprocatingmovement of the table at the desired time. As the crank 123 is rotated,the sector gear 118 will be reciprocated about its pivot 119 in such amanner as to efiect movement of the table B backward and forward. Thedriving means is preferably so timed that one complete revolution of thecrank 23 will cause one complete backward and forward stroke of thetable.

'Ihe cutting mechanism C embodies a pair of vertical stationarystandards 130 and 131 located at opposite sides of the machine andhaving secured to the upper ends thereof a cross member or beam 132,said beam being arranged above the table B and supporting a series ofcutting units arranged side by side transversely of the table, each unitbeing designated in its entirety by the numeral 133. with the cuttersbeing preferably, although not necessarily, spaced about one inch apart.4

Referring now more particularly to Figs. 10 to 15, it will be seen thateach cutting unit 133 includes a pair of relatively thin electro-magnets134 positioned one above the other and each consisting of a metal core135 about which is wound the usual coil 136. 'I'he cores 135 for eachpair magnets are connected together at their rear ends by a member 137,to which is secured a bracket 138, said bracket being provided with abase 139 which is adapted to rest upon the inclined portion 140 of crossbeam 132. This inclined portion has an opening 141 therein, andprojecting upwardly through this opening is a bolt 142 threaded withinthe base 139 of bracket 138, a washer 143 bearing against the undersideof inclined portion 140. By this means. the electro-magnets are rigidlysecured to the cross beam, the forward ends By loosening the bolt 142and adjusting screw 146,

the proper positioning of the electro-magnets can I be effected.

Each of the cutting units 133 also includes a upon a horizontal Figs. 14and 17, the L-shaped lever 147 of each cutting unit is carried upon anindividual pin 150, said pin projecting beyond the lever at oppositeplate 152 constitutes the other half of the bearing, being secured tothe respective ear by a screw or other fastening element 153. Thisconstruction is provided in order that any one of the levers 147 may beremoved from the machine without lever, whereupon the lever can beremoved, which the plates 152 are again secured in place.

The horizontal arm 148 of lever 147 is provided with an oifset foot 154formed` with an open slot 155 and having grooves 156 upon the lower ahead 160 having formed upon the flat upper surface thereof ribs 161which fit within the grooves 156 in the otset foot 154. The body portionof the shoe also has a threaded opening 162 adapted to receive thereinthe securing element 163. '1111s securing element is in the form of anordinary bolt, and carried thereby and received within the slot 155 infoot 154 is an eccentric -164 formed with a wrench engaging head 165 sothat it can be readily turned. With such a construction, it will beapparent that upon loosening the bolt 163 and rotating the eccentric164, the shoe 157 can be adjusted transversely with respect to the foot154, the ribs 161 fitting within slots 156 serving to prevent anyrotation. of the said shoe.

Adapted to be supported upon the arcuately curved bottom plate 158 ofshoe 157 is a member 166 pivotally secured to the said shoe by means ofa bolt 167 passing loosely through the opening 168 in flange 159 andthreaded within the opening 169 in member 166. The bottom of the member166 is beveled as at 170, and extending vertically through the saidmember is a substantially square opening 171. The member 166 is alsoformed with a cut-out portion or recess 172 communicating with theopening 171. Adapted to be received within the opening 171 is a cutterholder 173, the bottom of which is likewise beveled as at 174. Thecutter holder 173 is also provided with a forwardly disposed stem 175,and when the cutter holder is inserted within the opening 171, this stemis received within recess 172. The cutter holder is provided with avertical opening 176 and the stem 175 is also formed with an openingcommunicating with the opening 176.

Adapted to be received within the opening 176 in cutter holder 173 isthe cutter 177 carrying at its lower end a cutting diamond 178 and itsupper end being formed with a knurled head 179, if desired, tofacilitate turning of the cutter within the opening 176 to adjust theposition of vthe diamond. 'Ihe cutter 177 is secured within the holder173 by means of a set screw 180 passing through the stern 175 while theholder 173 is secured within the opening 171 by a set screw 181 passingthrough opening 182 in member 166. The holder 173 is supported withinthe member 166 by means of a nut 183 threaded upon the upper cylindricalend 184 of holder 173, said nut resting upon the top of member 166. Uponloosening of the set screw 180, the cutter 177 can be rotated withinopening 176 to facilitate proper positioning of the cutting diamond.Likewise, upon loosening of set screw 181 and rotation of nut 183, thecutter holder 173 can be moved upwardly or downwardly within opening 171to adjust the vertical position of the cutter. When the above parts arein properly assembled position, the cutter 1178 is adapted to projectdownwardly through the slot 185 in the bottom plate 158 of shoe 157.

The upper end of the vertical arm 149 of each lever 147 is'bifurcated toprovide spaced ears 186 which straddle a sleeve 187, being pivotallysecured thereto by a pin 188. The sleeve 187 is slidably mounted upon asplit bolt 189 pivoted at its inner end as at 190 to a metal bar 191,which in turn has a pivotal mounting at its upper end as at 192 with abracket 193 nxedly carried by the cores 135 of the electro-magnets.'I'hreaded upon the outer end of the split bolt 189 is a nut 194, andencircling the bolt and bearing at one end against the sleeve 187 and atits opposite en'd against the nut 194 is a compression spring 195normally tending to urge the sleeve 187 and consequently the lupper endof the lever arm 149 inwardly. The pin 188 of course passes looselythrough the slot in .the bolt 189.

Loosely received through the portion 196 of bracket 193 is a bolt 197having secured to its inner end a tension springv 198, the opposite endof said spring being connected to the bar 191' and acting to normallydraw the said bar away from and out of engagement with the cores of theelectro-magnets as indicated by the broken lines in Fig. 10 A nut 199 isthreaded upon the outer end of bolt 197 to adjust the tension of spring198. Also carried by the portion 196 of bracket 193 is a stop bolt 200which engages bar 191 and serves to limit the outward movement thereofabout its pivot 192. In practice, when the electro-magnets 184 areenergized, the bar 191 will be drawn inwardly thereby against the actionof spring 198, and of course the inward movement of bar 191 will causethe lever 147 to be rocked in a counter-clockwise direction upon pin150, which will eiect a lowering of the cutter 178 into cuttingposition. However, upon de-energization of the electro-magnets, thespring 198 will function to swing the bar 191 outwardly so as to rockthe lever 147 in a clockwise direction to return the cutter 178 to anoncutting position. The spring 195 serves to yieldably mantain thecutter in engagement with the glass during the cutting operation, whileat the same time allowing a limited amount of rockmg movement of thelever 147 to take care of any unevenness in the glass surface. In otherwords, the lever 147 is permitted a slight rocking movement even whenthe bar 191 is held inwardly by the electro-magnets.

Supported beneath the top of the table B at the forward end of themachine and within convement reach of the operator is a switchboard 202extending transversely of the table and including a plurality ofconventional spring snap switches 208, one being provided for each ofthe cutters being connected in series with the correspondng pair ofelectro-magnets 134, each sw1tch including the usual key or finger-piece204. 'I'he switches 203 are supported upon the horiaontal portion 205 ofa channel member 206 crried byblraclets 207 (Fig. 2) secured to thesemem rs 0and5 frame A. 1 of the supporting.

Carried at the bottom of the channel member 206 adjacent each side ofthe machine is a depending bracket 207, and extending between andcarried by these brackets is a shaft 208 having mounted thereupon asubstantially U-shaped operating rod 209 by means of which the saidshaft may be oscillated. Carried by the shaft 208 at spaced locationslongitudinally thereof are the three actuating fingers 210, 211 and 212shown in Figs. 27, 28 and 29 respectively, the

purpose of which will be more fully hereinafter described.

The individual switches 203 comprising the switchboard 202 are adaptedto be manually closed by the operator at the beginning of the cuttingoperation, the switches closed being dependent upon which cutters it isdesired to employ in the cutting operation. However, after the cuttingoperation has been completed, the switches are preferably automaticallyopened by the table B when it reaches the end of its cutting stroke. Themeans for automatically opening the switches at the proper horizontalknock-out bar 213 positioned at the rear of the switchboard andsupported at its opposite ends and also intermediate its ends if desiredby arms 214 pivotally mounted as at 215 to brackets 216 carried by thechannel member 206.

Also secured to the channel member 206 adjacent each side of the machineis a bracket 217, and pivotally connected thereto as at 218 is a letimemay include a ver arm 219, the upper end of the lever arm being adaptedto engage the knock-out bar 213 and move the same forwardly to open theswitches 203. Pivotally connected to the lower end of the lever arm 219as at 220 is one end of a rod 22.1 which extends longitudinally of theadjacent its rear end with a notch 222 adapted to receive therein a pin223 carried by link 224 pivoted at 225 to a bracket 226 fixed to thesupporting frame of the machine. When the table B reaches the end of itsrearward cutting movement. the lower end 227 carried at the forward endthereof is adapted to engage pin 222 thereby swingpivot 218 and ing theswitchboard 202 may be connected with' its corresponding pair ofelectro-magnets in the following manner:

rality of conventional two-part electrical connectorsl 232, one beingprovided for each switch 203 and being electrically connected therewithby wires contained within the cable 233. Extending between and supportedby two upstanding brackets 234 mounted upon the cross beam 132 is asimilar plate 235 carrying a plurality of electrical connect-ors 236,

of electro-magnets 134 and by each plate 231 and 235 are connectedtogether by a common wire 240.

As best illustrated in Fig.

are actuated upon movement of the cutting table. The motor safety switchis also actuated by the operating rod 209, but

.upon movement thereof inwardly. The motor ting operation, the cuttingtable B is at the extreme end of its forward movement as illustrated inFis. 2 and all specting the glass, the operator closes the ldesiredindividual switches 203 by pushing the nger pieces 204 rearwardly.Inasmuch as the cutter drop switch 244 is still open, the circuitthrough the electro-magnets 134 is not completed and as a consequence,the mere closing of the individual ment thereof.

When the table reaches the extreme

